Display Driver Backup Control for Pixel Compensation Data

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Solution Overview

Problem

Existing display panels experience stress accumulation leading to variations in pixel brightness over time, which existing compensation methods fail to address efficiently, causing image quality degradation.

Innovation Solution

A display driver circuit with a backup controller that monitors the compensation circuit's status and reads partial compensation data from a display memory during idle times, storing it in a buffer memory and then transferring it to a nonvolatile memory to maintain image quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If compensation data is backed up continuously, then backup completeness is improved, but collision with compensation circuit operation increases causing slower backup speed

Engineering Contradiction:

Improvebackup completenessVSAvoidbackup speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The backup controller dynamically adjusts its operation by monitoring the compensation circuit's status and adapting the backup timing accordingly, switching between active backup mode and idle waiting mode based on real-time circuit state

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The backup controller monitors the compensation circuit status and uses this feedback information to determine when to perform backup operations, creating a closed-loop control system that optimizes backup timing

Inventive Principle:

Principle #23Feedback

2Reliability

If backup operations are performed frequently, then data safety is improved, but collision with compensation operation increases causing delays

Engineering Contradiction:

Improvedata safetyVSAvoidbackup delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The backup controller performs preliminary monitoring of the compensation circuit status and prepares backup operations in advance, executing backups during predetermined idle periods before they are actually needed

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The backup controller acts as an intermediary that coordinates between the compensation circuit and the backup memory, mediating their operations to avoid conflicts while ensuring data safety

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12518719B2Display driver circuit, electronic device including display driver circuit, and operating method of display driver circuit

Publication Date: 2026.01.06 SAMSUNG ELECTRONICS CO LTD

AI summary

The present disclosure provides apparatuses including display driver circuits and operating methods thereof. In some embodiments, an electronic device includes a display panel, a nonvolatile memory, and a display driver circuit configured to receive frame data through a video interface channel, generate compensated frame data by compensating for the frame data by using compensation data, and send the compensated frame data to the display panel. The display driver circuit includes a display memory configured to store the compensation data, a compensation circuit configured to generate the compensated frame data from the frame data, a buffer memory, and a backup controller configured to monitor a status of the compensation circuit, and, when the compensation circuit is in an idle state, read partial data among the compensation data from the display memory, and write data present in the buffer memory in the nonvolatile memory.